在
中,内角
、
、
所对的边分别为
、
、
,
且满足
若点
是
外一点,
,则四边形
的面积的最大值为_______________ .
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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更新时间:2019-10-12 13:53:47
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